allocated. Also, thanks to Justin Guyett for finding a problem the
hashmap_remove() function. There was a problem where an entry's "prev"
pointer could be pointing to freed memory.
Finally, renamed all "maps" to bucket to make the source more
understandable.
This required a bunch of changes to the source (like the inclusion of the
end_iterator member variable.) All this was required by sites like Yahoo
which send out multiple "Set-Cookie" headers. tinyproxy needs to handle
this situation correctly.
